Pump-filter.



R. E. MILES.

PUMP FILTER.

APPLICATION IILIJD JULY 1e, 1912..

1,079,875, Patented Nov. 25, 19,13.

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Ross E. MILES, or MERETA, TEXAS.

PUMP-FILTER.

Specification of Letters Patent.

PatentecLNov. 25, 1913.

Application led July 19, 1912. Serial No. 710,470.

To all whom 25 may concern.'

Be it known that I, Ross E. MILES, a c1t1- zen of the United States,residing at Mereta, p in the county of Tom Green and State ofr Texas,have invented new and useful Improvements in Pump-Filters, of which thefollowing is a specification.

This invention relates to improvements in pumps and has particularapplication to filters for pumps.

In carrying out the present invention it is my purpose to provide afilter, whereby oil, dirt, dust and other foreign matter will beprevented from traversing the fluid conducting tube leading from thepump, thereby enabling the air to be forced out of the pump and into avehicle tire or the like, in a clean state.

Furthermore, I aim to provide a filter which will receive the fiuidsubsequent to the same being acted upon by the piston of the pump andwhich will effectively retain the oil and prevent the passage of thesame from the pump.

A further object of my invention is the provision of a filter which willembrace in its construction the desired features of simplicity,eficiency and durability and one which may be manufactured and marketedat a relatively low cost, and furthermore, my filter may be attached toany vstyle of pump without materially changing or affecting thestructure.

With the above recited obj ects in view and others of a similar naturethe invention consists in the construction, combination and arrangementof parts hereinafter set forth in and falling within the scope of theclaim.

In the accompanying drawing, the figure is a vertical central sectionalview through a pump equipped with the present invention.

In the present instance, I have shown my invention as applied to adouble acting air pump. It is to be understood, however, that theinvention in its useful application is not limited to any particulartype or style of pump, as the same is equally applicable to pumpsutilized for pumping other fluids, such, for instance, as gas, and thelike and of the single acting type.

Referring now to the accompanying drawing in detail, the numeral 1indicates the body or cylinder of the pump having the opposite endsthereof opened. A suitable base 2 formed with an air chamber 3 having arelatively large aperture t therein is designed to receive one end ofthe pump cylinderl and is further provided with a valve air inlet 5 anda valve outlet 6. Threaded onto or otherwise fastened to the free end ofthe pump cylinder 1 is a head 7 provided with a valve air intake port 8and a similar outlet port 9, said head being further formed with anaperture co-axial with the pump cylinder and carrying a stufiing box 10through which latter is passed the piston rod 11 carrying the piston 12adapted to be reciprocated within the pump cylinder 1 under the actionof the piston rod.

The pump herein described and illustrated is of the double acting typeand the operation thereof is substantially as follows: On the up strokeof the piston 12 under the action of the piston rod 11, the intake valvein the passage 5 opens, while the outlet valve in the passage 6 closes,thereby enabling the air to be drawn into the pump cylinder.Simultaneously with this operation the air inlet valve in the port S atthe opposite end of the cylinder closes, while the outlet valve in theport 9 opens, thus enabling the air, previously drawn into the cylinderthrough the air inlet port 8 on the down stroke of the piston, to beforced out of the same by way of the outlet port 9, the down stroke ofthe piston closing the valve in the air intake 5 and forcing the air outof the cylinder by way of the outlet 6.

The filter, in the present instance, is arranged parallel with thecylinder l and consists of a tube or cylinder 13 of relatively smalldiameter as compared with the similar dimension of the cylinder 1 andhas the opposite ends thereof threaded or otherwise fastened into theair chamber 3 and the head 7 and is in communication with the cylinder 1by way of the exhaust valves in the passages or ports 6 and 9respectively, of the air chamber and the head. Mounted within each endof the tube 13 and sur rounding the respective outlet passage of thecylinder 1, is a screen 14 constructed of any suitable material anddesigned to strain or filter the air as the same leaves the pumpcylinder to minimize the passage of oil and other foreign matter' fromthe pump cylinder with the air. Extending into the cylinder 13 andterminating approximately centrally of the length of such cylinder, isan air conducting pipe 15 of relatively small diameter, the free end ofsuch pipe being passed through the stuffing box 16 at the respective endof the tube or cylinder 13 and having connections with an air hose 17,the free ends ofthe air hose being provided with a suitable nipplewhereby the same may be connected to a tire for the inflation thereof.

From the foregoing description taken in connection with the accompanyingdrawing, the construction and manner of employing my invention will bereadily apparent. As i the air leaves the cylinder through one or theother of the exhaust passages, oil and other foreign matter, is, to acertain extent, extracted therefrom by means of the screens 14, the airsubsequently passing from thethe claim without departing from the spiritof the invention.

I claim:

In a pump, a cylinder having a piston adapted for reciprocation therein,a ilter comprising a tube parallel with said cylinder and of relativelysmall diameter, screens at the opposite ends of said tube, a baseconnected to the lower ends of said cylinder and tube and supporting thesame and coinmon thereto, and a head connected to the upper ends of saidcylinder and tube and common thereto, said base and head carrying thedischarge valves of said pump and serving to establish communicationbetween the exhaust side of said cylinder and tube whereby the airdelivered from the pump cylinder will be filtered.

In testimony whereof I aiix my signature in presence of two witnesses.

ROSS E. MILES.

lVitnesses:

C. B. LoNGMIRn, i LULA ROBERTS.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Iatents, Washington, D. C.

